/* drivers/input/sensors/access/dmard10.c
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*
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* Copyright (C) 2012-2015 ROCKCHIP.
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* Author: guoyi <gy@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/gpio.h>
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#include <linux/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/freezer.h>
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#include <linux/of_gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/sensor-dev.h>
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/* Default register settings */
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#define RBUFF_SIZE 12 /* Rx buffer size */
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#define REG_ACTR 0x00
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#define REG_WDAL 0x01
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#define REG_TAPNS 0x0f
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#define REG_MISC2 0x1f
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#define REG_AFEM 0x0c
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#define REG_CKSEL 0x0d
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#define REG_INTC 0x0e
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#define REG_STADR 0x12
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#define REG_STAINT 0x1C
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#define REG_PD 0x21
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#define REG_TCGYZ 0x26
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#define REG_X_OUT 0x41
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#define MODE_Off 0x00
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#define MODE_ResetAtOff 0x01
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#define MODE_Standby 0x02
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#define MODE_ResetAtStandby 0x03
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#define MODE_Active 0x06
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#define MODE_Trigger 0x0a
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#define MODE_ReadOTP 0x12
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#define MODE_WriteOTP 0x22
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#define MODE_WriteOTPBuf 0x42
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#define MODE_ResetDataPath 0x82
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#define VALUE_STADR 0x55
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#define VALUE_STAINT 0xAA
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#define VALUE_AFEM_AFEN_Normal 0x8f// AFEN set 1 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
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#define VALUE_AFEM_Normal 0x0f// AFEN set 0 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
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#define VALUE_INTC 0x00// INTC[6:5]=b'00
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#define VALUE_INTC_Interrupt_En 0x20// INTC[6:5]=b'01 (Data ready interrupt enable, active high at INT0)
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#define VALUE_CKSEL_ODR_0_204 0x04// ODR[3:0]=b'0000 (0.78125Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_1_204 0x14// ODR[3:0]=b'0001 (1.5625Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_3_204 0x24// ODR[3:0]=b'0010 (3.125Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_6_204 0x34// ODR[3:0]=b'0011 (6.25Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_12_204 0x44// ODR[3:0]=b'0100 (12.5Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_25_204 0x54// ODR[3:0]=b'0101 (25Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_50_204 0x64// ODR[3:0]=b'0110 (50Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_CKSEL_ODR_100_204 0x74// ODR[3:0]=b'0111 (100Hz), CCK[3:0]=b'0100 (204.8kHZ)
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#define VALUE_TAPNS_NoFilter 0x00 // TAP1/TAP2 NO FILTER
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#define VALUE_TAPNS_Ave_2 0x11 // TAP1/TAP2 Average 2
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#define VALUE_TAPNS_Ave_4 0x22 // TAP1/TAP2 Average 4
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#define VALUE_TAPNS_Ave_8 0x33 // TAP1/TAP2 Average 8
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#define VALUE_TAPNS_Ave_16 0x44 // TAP1/TAP2 Average 16
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#define VALUE_TAPNS_Ave_32 0x55 // TAP1/TAP2 Average 32
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#define VALUE_MISC2_OSCA_EN 0x08
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#define VALUE_PD_RST 0x52
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//#define DMARD10_REG_INTSU 0x47
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//#define DMARD10_REG_MODE 0x44
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//#define DMARD10_REG_SR 0x44
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#define DMARD10_REG_DS 0X49
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#define DMARD10_REG_ID 0X0F
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#define DMARD10_REG_IT 0X4D
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#define DMARD10_REG_INTSRC1_C 0X4A
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#define DMARD10_REG_INTSRC1_S 0X4B
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#define MMAIO 0xA1
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// IOCTLs for DMARD10 library
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#define ECS_IOCTL_INIT _IO(MMAIO, 0x01)
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#define ECS_IOCTL_RESET _IO(MMAIO, 0x04)
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#define ECS_IOCTL_CLOSE _IO(MMAIO, 0x02)
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#define ECS_IOCTL_START _IO(MMAIO, 0x03)
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#define ECS_IOCTL_GETDATA _IOR(MMAIO, 0x08, char[RBUFF_SIZE+1])
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#define SENSOR_CALIBRATION _IOWR(MMAIO, 0x05 , int[SENSOR_DATA_SIZE])
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// IOCTLs for APPs
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#define ECS_IOCTL_APP_SET_RATE _IOW(MMAIO, 0x10, char)
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//rate
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#define DMARD10_RATE_32 32
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/*
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#define DMARD10_RATE_64 64
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#define DMARD10_RATE_120 128
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#define DMARD10_RATE_MIN DMARD10_RATE_1
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#define DMARD10_RATE_MAX DMARD10_RATE_120
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*/
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/*status*/
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#define DMARD10_OPEN 1
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#define DMARD10_CLOSE 0
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#define DMARD10_NORMAL 2
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#define DMARD10_LOWPOWER 3
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#define DMARD10_IIC_ADDR 0x18
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#define DMARD10_REG_LEN 11
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#define DMARD10_FATOR 15
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#define DMARD10_X_OUT 0x41
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#define SENSOR_DATA_SIZE 3
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#define DMARD10_SENSOR_RATE_1 0
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#define DMARD10_SENSOR_RATE_2 1
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#define DMARD10_SENSOR_RATE_3 2
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#define DMARD10_SENSOR_RATE_4 3
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#define POWER_OR_RATE 1
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#define SW_RESET 1
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#define DMARD10_INTERRUPUT 1
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#define DMARD10_POWERDOWN 0
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#define DMARD10_POWERON 1
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//g-senor layout configuration, choose one of the following configuration
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#define AVG_NUM 16
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#define SENSOR_DATA_SIZE 3
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#define DEFAULT_SENSITIVITY 1024
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#define DMARD10_ENABLE 1
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#define DMARD10_REG_X_OUT 0x12
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#define DMARD10_REG_Y_OUT 0x1
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#define DMARD10_REG_Z_OUT 0x2
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#define DMARD10_REG_TILT 0x3
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#define DMARD10_REG_SRST 0x4
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#define DMARD10_REG_SPCNT 0x5
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#define DMARD10_REG_INTSU 0x6
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#define DMARD10_REG_MODE 0x7
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#define DMARD10_REG_SR 0x8
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#define DMARD10_REG_PDET 0x9
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#define DMARD10_REG_PD 0xa
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#define DMARD10_RANGE 4000000
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#define DMARD10_PRECISION 10
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#define DMARD10_BOUNDARY (0x1 << (DMARD10_PRECISION - 1))
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#define DMARD10_GRAVITY_STEP (DMARD10_RANGE / DMARD10_BOUNDARY)
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struct sensor_axis_average {
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int x_average;
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int y_average;
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int z_average;
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int count;
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};
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static struct sensor_axis_average axis_average;
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int gsensor_reset(struct i2c_client *client){
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char buffer[7], buffer2[2];
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/* 1. check D10 , VALUE_STADR = 0x55 , VALUE_STAINT = 0xAA */
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buffer[0] = REG_STADR;
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buffer2[0] = REG_STAINT;
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sensor_rx_data(client, buffer, 2);
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sensor_rx_data(client, buffer2, 2);
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if( buffer[0] == VALUE_STADR || buffer2[0] == VALUE_STAINT){
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DBG(KERN_INFO " REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d\n", buffer[0], buffer2[0]);
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DBG(KERN_INFO " %s DMT_DEVICE_NAME registered I2C driver!\n",__FUNCTION__);
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}
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else{
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DBG(KERN_INFO " %s gsensor I2C err @@@ REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d \n", __func__, buffer[0], buffer2[0]);
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return -1;
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}
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/* 2. Powerdown reset */
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buffer[0] = REG_PD;
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buffer[1] = VALUE_PD_RST;
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sensor_tx_data(client, buffer, 2);
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/* 3. ACTR => Standby mode => Download OTP to parameter reg => Standby mode => Reset data path => Standby mode */
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buffer[0] = REG_ACTR;
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buffer[1] = MODE_Standby;
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buffer[2] = MODE_ReadOTP;
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buffer[3] = MODE_Standby;
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buffer[4] = MODE_ResetDataPath;
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buffer[5] = MODE_Standby;
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sensor_tx_data(client, buffer, 6);
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/* 4. OSCA_EN = 1 ,TSTO = b'000(INT1 = normal, TEST0 = normal) */
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buffer[0] = REG_MISC2;
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buffer[1] = VALUE_MISC2_OSCA_EN;
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sensor_tx_data(client, buffer, 2);
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/* 5. AFEN = 1(AFE will powerdown after ADC) */
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buffer[0] = REG_AFEM;
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buffer[1] = VALUE_AFEM_AFEN_Normal;
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buffer[2] = VALUE_CKSEL_ODR_100_204;
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buffer[3] = VALUE_INTC;
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buffer[4] = VALUE_TAPNS_Ave_2;
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buffer[5] = 0x00; // DLYC, no delay timing
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buffer[6] = 0x07; // INTD=1 (push-pull), INTA=1 (active high), AUTOT=1 (enable T)
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sensor_tx_data(client, buffer, 7);
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/* 6. write TCGYZ & TCGX */
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buffer[0] = REG_WDAL; // REG:0x01
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buffer[1] = 0x00; // set TC of Y,Z gain value
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buffer[2] = 0x00; // set TC of X gain value
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buffer[3] = 0x03; // Temperature coefficient of X,Y,Z gain
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sensor_tx_data(client, buffer, 4);
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buffer[0] = REG_ACTR; // REG:0x00
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buffer[1] = MODE_Standby; // Standby
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buffer[2] = MODE_WriteOTPBuf; // WriteOTPBuf
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buffer[3] = MODE_Standby; // Standby
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/* 7. Activation mode */
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buffer[0] = REG_ACTR;
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buffer[1] = MODE_Active;
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sensor_tx_data(client, buffer, 2);
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printk("\n dmard10 gsensor _reset SUCCESS!!\n");
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return 0;
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}
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/****************operate according to sensor chip:start************/
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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gsensor_reset(client);
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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//register setting according to chip datasheet
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if(enable)
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{
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status = DMARD10_ENABLE; //dmard10
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sensor->ops->ctrl_data |= status;
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}
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else
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{
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status = ~DMARD10_ENABLE; //dmard10
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sensor->ops->ctrl_data &= status;
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}
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DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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printk("%s:fail to active sensor\n",__func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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result = sensor->ops->active(client,0,0);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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DBG("%s:DMARD10_REG_TILT=0x%x\n",__func__,sensor_read_reg(client, DMARD10_REG_TILT));
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result = sensor_write_reg(client, DMARD10_REG_SR, (0x01<<5)| 0x02); //32 Samples/Second Active and Auto-Sleep Mode
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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if(sensor->pdata->irq_enable) //open interrupt
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{
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result = sensor_write_reg(client, DMARD10_REG_INTSU, 1<<4);//enable int,GINT=1
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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}
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sensor->ops->ctrl_data = 1<<6; //Interrupt output INT is push-pull
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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memset(&axis_average, 0, sizeof(struct sensor_axis_average));
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return result;
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}
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static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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{
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s64 result;
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result = ((int)high_byte << 8) | ((int)low_byte);
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return result * 128;
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}
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static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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if (sensor->status_cur == SENSOR_ON) {
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/* Report acceleration sensor information */
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input_report_abs(sensor->input_dev, ABS_X, axis->x);
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input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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input_report_abs(sensor->input_dev, ABS_Z, axis->z);
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input_sync(sensor->input_dev);
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}
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return 0;
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}
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#define DMARD10_COUNT_AVERAGE 2
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#define GSENSOR_MIN 2
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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struct sensor_platform_data *pdata = sensor->pdata;
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int ret = 0;
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int x,y,z;
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struct sensor_axis axis;
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char buffer[8] = {0};
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char value = 0;
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if(sensor->ops->read_len < 3) //sensor->ops->read_len = 3
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{
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printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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return -1;
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}
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memset(buffer, 0, 8);
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/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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do {
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*buffer = sensor->ops->read_reg;
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ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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if (ret < 0)
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return ret;
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} while (0);
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//this gsensor need 6 bytes buffer
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x = sensor_convert_data(sensor->client, buffer[3], buffer[2]); //buffer[1]:high bit
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y = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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z = sensor_convert_data(sensor->client, buffer[7], buffer[6]);
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axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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gsensor_report_value(client, &axis);
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mutex_lock(&sensor->data_mutex);
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sensor->axis = axis;
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mutex_unlock(&sensor->data_mutex);
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:sensor int status :0x%x\n",__func__,value);
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}
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return ret;
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}
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static struct sensor_operate gsensor_dmard10_ops = {
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.name = "gs_dmard10",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_DMARD10,
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.read_reg = DMARD10_REG_X_OUT,
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.read_len = 8,
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.id_reg = SENSOR_UNKNOW_DATA,
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.id_data = SENSOR_UNKNOW_DATA,
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.precision = DMARD10_PRECISION,
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.ctrl_reg = DMARD10_REG_MODE,
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.int_status_reg = SENSOR_UNKNOW_DATA,
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.range = {-65536, 65536},
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.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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/****************operate according to sensor chip:end************/
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static int gsensor_dmard10_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &gsensor_dmard10_ops);
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}
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static int gsensor_dmard10_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_dmard10_ops);
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}
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static const struct i2c_device_id gsensor_dmard10_id[] = {
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{"gs_dmard10", ACCEL_ID_DMARD10},
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{}
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};
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static struct i2c_driver gsensor_dmard10_driver = {
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.probe = gsensor_dmard10_probe,
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.remove = gsensor_dmard10_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_dmard10_id,
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.driver = {
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.name = "gsensor_dmard10",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(gsensor_dmard10_driver);
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MODULE_AUTHOR("guoyi <gy@rock-chips.com>");
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MODULE_DESCRIPTION("dmard10 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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